Avoid file leak in JavaSPIExtensionLoader

core/impl-base/src/main/java/org/jboss/arquillian/core/impl/loadable/JavaSPIExtensionLoader.java

@@ -21,6 +21,7 @@
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.net.URL;
+import java.net.URLConnection;
 import java.util.Collection;
 import java.util.Enumeration;
 import java.util.LinkedHashMap;
@@ -166,7 +167,10 @@ private <T> Set<Class<? extends T>> load(Class<T> serviceClass, ClassLoader load
             Enumeration<URL> enumeration = loader.getResources(serviceFile);
             while (enumeration.hasMoreElements()) {
                 final URL url = enumeration.nextElement();
-                final InputStream is = url.openStream();
+                URLConnection jarConnection = url.openConnection();
+                //Don't cache the file (avoids file leaks on GlassFish).
+                jarConnection.setUseCaches(false);
+                final InputStream is = jarConnection.getInputStream();
                 BufferedReader reader = null;
 
                 try {